diff --git a/tubes.lua b/tubes.lua
index 9c13d66..5e6ca4f 100644
--- a/tubes.lua
+++ b/tubes.lua
@@ -182,6 +182,10 @@ pipeworks.register_tube = function(name, desc, plain, noctrs, ends, short, inv,
 				paramtype = "light",
 				sunlight_propagates = true,
 				description = "Pneumatic tube segment (legacy)",
+				on_construct = function(pos)
+					local meta = minetest.get_meta(pos)
+					meta:set_int("tubelike", 1)
+				end,
 				after_place_node = function(pos)
 					pipeworks.scan_for_tube_objects(pos)
 					if minetest.registered_nodes[name.."_1"].after_place_node_ then